Soldering tool



Feb. 27, 1923.

T. CUNNINGHAM SOLDERING TOOL v Filed Jan. 22 1921 FZTJ FI@ I- INVENToR.

ATTORNYS.

h m w S1. m M T W I TNESSES Paitented Febo 227, i923.

@nonies curtains-nera, y or' enrrianntriia rnnnsfrnvan'rn, Assiettes "ro nonnina a. nova, or niermann-mrite, PENNSYLVANIA.; y ,3, I

appucauon sie@ ,Tammy 22, 192iseriaine. 439,080." f-

To all whom @may concern.' f ,i

Be it known that l, Tiroanis CUNNrNG- naar, a citizen :otl the United States, residing in Philadelphia, in the countyv of Philadelphia andA State of Pennsylvania, have invented certain new and useful Improvements in Soldering Tools, whereof the following is a specification, reference being had tothe accompanying' drawings. .i

The invention relates to tools such as are used in soldering, brazingfand analogous operations, and more' especially to soldering irons -in which fuel isv employed as a heating medium.

lThe object of my invention is to secure maximum efficiency in soldering tools of the stated type, together with utmost simplicity so that they may be easily manipulated, cheaply manufacured, and prove durable in .long continued service.

Other objects and advantages of my invention will become apparent from the detailed description which follows;

ln the drawings, Fig. l is, an axial sec` tional View of a soldering tool conveniently embodying my invention; and

Fig. ll is an elevation of' the same.

The structure as herein represented, has a handle 1 of suitable non-conductive material,

preferably wood, through which extends axially, a metallic tube 2. This tube is somewhat longer than the handle so as to permit protrusion of its opposite ends which are screw threaded as clearly shown at?) and 4t in Fig. l. To the protruding end 3 of the tube 2, is secured a cock 5 of Well known construction adapted for controlling the flow of fuel gas supplied through a flexible tube 6 attached to the nipple of said cock.r

`To the opposite protrusion 4 of the tube 2, 4

is secured, in axial continuation, the reduced end of a hollow shank 7, which, as will be seen vfrom the illustration, is considerably larger in diameter than said tube. An out let nozzle 8 of the tube 2, extends a short distance within the hollow of the shank 7 and at this region, the latter is provided with a series of inlet openings 9-9 which are controllable by means of an adjustable apertured band 10 held from displacement by virtue of its conformity inv configuration with that of the shank end on the one hand, and, on the other, by being overhung by the lower end of the handle 1 From this construction, it will be apparent thatthe quan- -a perfect combustible'mixture. proportions of thehollow yof-'thefshan'k ser ve tit?? '0f irldrawnrinto theihollowl-shank 7 ,i .under .the actionotthejet issuing.` from th nozzle 8,.may `be so regulated as to .produce The ample tot aiif'ord withinlita chamber."for `thorough mixing of the .two gases-before they reach the Y [Point of con'lbustionas-willbev manifest from further description.` i

The' outer end-'of the shank 7 .is bifurcated, i

as shown at l11i in'Figl, to receivea soldering bit lwhichhas anaxial cavity 14.' Said bitl is square in cross section,iand formed 'with-a tapered tip-'15 as is' usual'with'sol'- ldering tools. w In practice, l prefer 1tomake the bitof a good yheat conductinglmaterial preferablycopper,l `and the samewm'ay be `attached by any appropriate securingl means,

for example by screw bolts such as shown at `16. From Fig. l, it willbe noted-that the mouth of the bore of the bit 13 is aligned with the duct of the shank 7, and that in the interval between them, the prongs 17-l7 of the bifurcation are op-positely bowed outwardly to afford a substantially annular, transversely extending, open ended passage 18, which serves as a combustion .chamber for the fuel gases and is larger in diameter than the shank thus affording maximum communication between the interior of the shank and the atmosphere.

ln the practical operation of the device, the flame resulting from the combustion ofthe gas delivered from the hose 6 under pres- 4 sure, is directed through the jet nozzle 8 and the shank 7 into the cavity 14: of the bit 13,.

thereby efliciently heating the same, while the products of the combustion are permitted to escape through the open endsof the pas i sage 18 in the manner suggested by the arrows in Fig. II. i

Having thus described my invention, I claim:

1. .A soldering` tool comprising. a tubular shank constituting a mixing chamber and formed at one end with a lateral opening greater in diameter than the diameter of the shank affording maximum communication between the atmosphere and the mixing chamber, means for admitting gaseous fuel to the mixing chamber'. and controlling means for admitting air to the mixing chamber for admixture 'with the fuel prior to combustion of the latter within the aforesaid lateral opening, and a bit carried by the `ico shank in Vclose relation to the combustion zone.

2. A soldering tool comprising a tubular shank constituting -a mixing chamber and enlargedl at oneen'd to forma combustion chamber, s aid chamber being intersected by a wide transverse passage greater in diameter than the shank affording maximum communication at both ends between the atmosphere and combustion chamber, means for v admitting gaseous fuel to the mixing chamber, controllable means for admitting lair 4to the mixing ,chamber for ladmixture with the fuel prior .to combustion of .the mixture within the combustion chamber, and a bit ycarried I bythe Walls ofthe combustion chamber and located within the combustion zione. l

3. A soldering tool ofthe characterdescribed, comprising, in combination, Ia soldering bit having at its inner end, an j'axial A cavity; and an axially aligned hollow supporting shank through which a mixture off air and ^fuelvgas underl pressure is conducted Iand directed tothe eavitjy of the bit, ysaid shank 'being generally tubular exjcept for a bifurcation within Whiohthe bitis received, the vprongs lof the bifurcation being tween the terminals, bolts securing the termina-ls to the bit in a releasable manner, a gas feeding tube itted to the other end of the shank, and a nozzle seated in said tube and protruding into the shank to a point beyond the air inlet openings. y l

1n testimony Vwhereof I have hereunto signed my name at Philadelphia, Pennsyl- Vania, this l19th day of January, 1921.

THOMAS CUNNINGHAM. lVitnesses:

'JAMES H. BELL,

E. L. FnLLn'RToN. 

